132 
THE FIRST BOOK OF BOTANY. 
Read the names of the parts of the embryo given 
in Figs. 224 and 225. Look at the definitions of these 
words. Compare your specimen with the figures, and 
point out its cotyledons ; its radicle ; its plumule. 
Handle your embryo with care, for it breaks easily. 
Has its radicle begun to put forth roots ? 
Take from your box a vigorous seed of Indian 
corn in which the roots have begun to grow, and 
compare it with Fig. 226. 
Fig 226. 
Separate the embryo and albumen, and, if it has 
grown as much as the one pictured above, you may 
easily find the cotyledon, the plumule, and the radicle. 
When you are sure that you have found the radi¬ 
cle or root-end of your embryo, that you know which 
part is cotyledon, and which plumule, take another 
seed of the same kind, but less grown—one where the 
root-end of the embryo has scarcely begun to swell— 
and see if you can find the parts. 
